Quantcast
Merriam-Webster Logo
  • Dictionary
  • Thesaurus
  • Medical
  • Scrabble
  • Spanish Central
  • Learner's Dictionary

Medical Dictionary

duodenum

play play
noun du·o·de·num \ˌd(y)ü-ə-ˈdē-nəm, d(y)u̇-ˈäd-ən-əm\

Medical Definition of duodenum

plural du·o·de·na \-ˈdē-nə, -ən-ə\play or du·o·de·nums

  1. :  the first, shortest, and widest part of the small intestine that in humans is about 10 inches (25 centimeters) long and that extends from the pylorus to the undersurface of the liver where it descends for a variable distance and receives the bile and pancreatic ducts and then bends to the left and finally upward to join the jejunum near the second lumbar vertebra

  2. du·o·de·nal \-ˈdēn-əl, -ən-əl\play play adjective



Illustration of duodenum


Learn More about duodenum


Seen and Heard

What made you want to look up duodenum? Please tell us where you read or heard it (including the quote, if possible).

WORD OF THE DAY

February 7, 2016

a slight offense

Get Word of the Day daily email!

WORD GAMES

Take a 3-minute break and test your skills!

image1037863653

Which of the following refers to thin, bending ice, or to the act of running over such ice?

spindrift duvet pince-nez kittly-benders
Name That Thing

10 quick questions: hear them, spell them, and see how your skills compare to the crowd.

TAKE THE QUIZ
SCRABBLE® Sprint

Test Your Knowledge - and learn some interesting things along the way.

TAKE THE QUIZ